How do I create an effective inflation layer in order to resolve the boundary layer?
Hello,
I am working on improving my meshing abilities and I came across the inflation feature that allows you to resolve the viscous sublayers close to the wall. I have confusion when it comes to determining the most suitable cell height. I utilize the following equations: Re = (rho*U*L) / mu y = ((y+)*mu) / U_tau*rho U_tau = sqrt(tau_w / rho) tau_w = 0.5*C_f*rho*U^2 where: U_tau is dimensionless velocity at the wall tau_w is the wall shear stress C_f is a friction coefficient Would I use these equations to determine y which would allow me to choose a suitable first wall height? How can I find C_f? Thank you. |
Yes, using the characteristic lenght L you can also write directly
y/L =y+/Re |
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